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Margins curling down

Z

Ziggaro

I've read a hundred posts of margins curling up, but what about when they're curling down?

I have a girl under 600 watts hps, temps from 70-85, ph of soil, water, and runoff is nearly 6.5, in ffof soil and given half strength feeding of EJ nute blend about a week ago.
She started showing some yellowed leaf edges and necrotic spots. the necrotic spots are holes and the underside of the leaf shows a dark outline to the holes.
The new lateral branched leaves are twisting and the margins on some are severely curled under.
the new growth at the top looks a little spindly too.

I thought it was CA since thats missing from my regimine, but my foliar feeding yesterday doenst seem to show any improvement today.

Got any ideas for me? Help comes much appreciated.
 
Blackvelvet

Blackvelvet

Member
Ziggaro said:
I thought it was CA since thats missing from my regimine, but my foliar feeding yesterday doenst seem to show any improvement today.
Click to expand...
You got the right idea figuring out what the plant is receiving and what its not.

An application of calcium will not uncurl leaves. They are forever damaged. New growth, however, would be okay.

If your low on calcium, I suggest calling around to garden centers and find calcium nitrate. Tomatoe growers use this often to prevent blossom end rot.

An alternative to the cal nitrate would be calcium chloride. It is sold in bottles under names like blossom end rot stopper for tomatoes.

Since calcium and magnesium compete (too much of one can cause a deficiency of another), you should apply both together unless your fert already contains mag. Try 1/8 teaspoon of both calcium nitrate and epsom salts per gallon of water along with the regular fert. This would give you about 35 ppm ca and 15 ppm mg. If your adding alot of potassium with your ferts, you might increase this dose to 1/4 teaspoon. (potassium competes with calcium and magnesium too)

If you are going to use calcium chloride, It will take the % ca and net weight of the bottle to give you a rate.

If your ph gets too low, you can apply some pulverized/powdered dolomite lime to the surface of the soil mix (maybe 1 1/5 teaspoons per gallon of mix) and stop adding cal mag to your water for a while.

:smoker:
 
Z

Ziggaro

since i just watered, i foliar fed with liquid calcium, which is comprised of calcium carbonate and calcium oxide., and also some magnesium compounds. I did pour about 6 ounces of the mix in the soil at the base of the plant but thats not much for a month old plant, and i didn't want to go overboard and have to worry about overwatering.

Leviticuz: Thankyou for your input but I don't believe magnesium is it. Usually magnesium gives leaf margins an upwards curl.

Blackvelvet: Thanks bro I appreciate your knowledge I did what I could. I was expecting the leaves to uncurl so thankyou for letting me know they won't, otherwise I would have kept adding stuff and mess up my only female :( Come to think of it, I've been adding 2 tbs of epsom salts to my water. Maybe I went overboard :S Again, thanx for the tips

Anyhow.. I can't find a troubleshooter that tells me what def. makes the leaves curl down, so I'm hoping its calcium. :) If anyone has an answer, please speak!! Thanks everyone!!
 
Z

Ziggaro

Hey here are the pics. Sorry it took a little while. The problem seems to have gone away but I'd still like to know what it is. Thanx!!

Here are my girls, i'm so proud of them!!




this is the leaf curl :/





thankyou anyone for helping
 
Z

Ziggaro

cmon ya'll nobody got any advice? not even a question? books do a lot of good, but theres too many variables in a grow for a first timer to get through it without any extra help! i got the greg green bible, i even got the cervantes bible. i memorize every page and still can't get all my problems solved :bashhead:
I been through a hundred pages in each forum. its agonizing sitting here for days waiting for a reply seeing my thread slip to page 2 and 3 and wondering if it will ever get answered
please help, i got another girl doin it now!!
 
G

Guest

Have you looked for bugs?Is the damage more at one part of plant ie top, bottom,old leaves new leaves?Are those yellow blotches or is that your camera?
 
Z

Ziggaro

temp is 70-80 (85 for a couple days when AC broke down) RH is 40
The yellow spots I believe are heat stress from the couple days the AC went funky, although the camera isn't angled to see them.
My only concern is of diagnosing the downwards leaf curl. That is the only problem occurring right now as far as I can see.
No there are no bugs. I have a good magnifying glass and a radioshack microscope. I obsess over my plants I've searched every inch of my room for any sign of bugs. None.
 
G

Guest

My leaves curl down in heat stress. Is the canopy hot? damage is on the new growth. that is the top or all new growth side shoots and all?
 
G

Guest

I have a gut feeling this is over feeding...repost this with all the info, temps,soil,neuts lighting. The more info you give the easier it is to help you.Put the pics upfront get some closer pics also. Put 'with pics in title of thread.Make lots of observations.
 
HeadyPete

HeadyPete

Take Five...
Veteran
All that epsom salt could have built up toxic salt levels....

Flush with plain water next time and see if they improve. It's easy to overfeed such small plants.

The leaf damage on the edges is the beginning of calcium deficiency. It should have halted by now, after the liquid calcium.
 
Z

Ziggaro

a few days have passed...

a few days have passed...

and the girl with the problems is still growing 1.5-2 inches a day.

soil- ffof
nutes- last fed with Earth Juice 1.5 TBS grow 1.5 TBS bloom 2 tsp microblast, 2 tsp Catalyst, 2 tsp Meta-K and 1 TBS liquid lime
light- 600watt hps
PH of feeding water- 6.5
ph of runoff- a little over 7 (used to be stable at 6.5, can't figure out what brought my ph over 7)
feeding frequency- last 2 feedings plain water only, before that feeding as described for nutes. Have since changed feeding for plants to 1 TBS bloom, 1 tsp catalyst as main feeding, adding microblast and meta-k as needed and grow as needed.
temperature- 65-80
humidity- 40-45
airflow- 265 CFM pole blower and 2 stand fans

some more questions:
1. I'm asking this question because my PH is a little too high right now. The guys at the shop mixed some PH up for me out of wood ashes. Does this stuff take time to raise the PH? Is there harm in using too much? I have to add 2 TBS or more to raise the PH to 6.5 using EJ, but even though my mixture and soil are naturally acidic, my PH is high!!
2. Can you please help me diagnose these babies with the info I gave now? Here are some updated pics.. THANX A BUNCH!! (BTW: the leaf curl is still present a little, but seems to be chilling out a little, and no problems with newest growth it looks great)









 
Z

Ziggaro

So I realized after a recent watering that my PH is just WAY too high. My PH drops read up to 7.6 and the PH of my runoff caps out my test, so the PH really could be up there.

I have been reading that lower PH of soil is an uphill battle with constant ammending, so I've decided I'll transplant when the soil is dry enough.

Any thoughts? Any advice? She's growing flowers for about a week now, will I have anything to smoke?

I'm still trying to salvage my 1st grow.. please help me!
 
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